Irritated by the fact that in #rustlang the slice `sort_by` mutates the contents rather than returning a sorted slice. This means any time I need sorting in a pipeline of data, this makes me stop and use a new variable.
Conversation
Because if it wants to go fast it needs to be inplace, otherwise it needs to allocate to return a new slice which is a performance hit. I'm not sure why you need a new variable? If it's a pipeline then you won't need the prior version of the data correct?
2
I need a new variable because I have to stop and collect the stream (which I understand). I guess I just want to be able to sort a collected stream like:
let x = f.map(...).filter(...).zip(...).collect().sort() , but sort returns () not a vec
2
Yeah agreed - I often want by-move versions of `&mut self`ish methods like `extend` and `push` 😖